1、蜗牛英语：snail，英 [sne?l] 美 [sne?l]。
2、蜗牛壳呈螺旋形。A snails shell is spiral in form.
3、火车这会儿走得跟蜗牛一样慢。The train was moving now at a snails pace.
4、这些蜗牛体宽不超过1厘米。The snails are no larger than one centimetre across.